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    Astm A500 square Hollow Section Rectangular square Mild Carbon Steel Tube

    ASTM A500 square and rectangular mild carbon steel hollow section tubes are types of hollow structural sections (HSS) commonly used in construction, manufacturing, and engineering applications. Characterized by their square/rectangular cross-sectional shape and made from mild carbon steel, our products are complete in specifications and have sufficient stock to meet your diverse needs.

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      product details

      Square and Rectangular Pipe Standards

      Standard Specifications: Complies with ASTM A500 standards, covering cold-formed welded and seamless carbon steel pipes.

      Shape Classification: Includes round, square, rectangular, and irregularly shaped pipes, among which square and rectangular pipes (A500 series) are widely used due to their superior mechanical properties.

      Materials and Properties

      Common Materials: Such as A500 Gr.B, which is a low-carbon steel with high strength and durability.

      Mechanical Properties: Tensile strength, yield strength, and other indicators meet structural engineering requirements, suitable for welding, riveting, or bolted connections.

      Product Description

      Square Tube/Rectangular Steel Pipes

      Material

      Q235, Q345, S275JR, S355JR, ASTM A500, A106, 20#, 45#, 16Mn, 42CrMo

      Outer Size (mm)

      20x20 to 500x500 (square), 20x40 to 400x600 (rectangular)

      Wall Thickness (mm)

      1.0 – 25.0

      Length

      6m / 12m / Custom cut

      Surface Treatment

      Black, Galvanized, Oiled, Painted

      Production Method

      ERW / Seamless / Hot Rolled

      Standards

      ASTM A500/A513/A106, EN 10210, EN 10219, GB/T 6728

      Common sizes

      Square tube size(mm)

      Rectangular tube size(mm)

      16x16x0.4~1.5

      200x200x6.0~12.0

      10x20x0.6~1.5

      80x100x2.0~8.0

      600x200x10~28.0

      18x18x0.4~1.5

      220x220x6.0~140

      14x21x0.6~1.5

      120x60x2.5~10.0

      600x400x10~28.0

      20x20x0.4~1.5

      250x250x6.0~14.0

      15x30x1.5~1.5

      120x80x2.5~10.0

      600x500x10~28.0

      25x25x0.6~2.0

      280x280x6.0~14.0

      15x38x0.6~1.5

      150x100x2.5~12.0

      800x400x10~28.0

      30x30x0.6~4.0

      300x300x8.0~14.0

      20x30x0.6~2.0

      180x150x2.5~12.0

      800x600x10~28.0

      34x34x1.0~2.0

      320x320x8.0~14.0

      20x40x0.8~2.0

      200x100x4~12.0

      800x700x10~28.0

      35x35x1.0~4.0

      350x350x8.0~14.0

      20x50x1.0~2.0

      250x150x6~12.0

      1000x400x10~28.0

      38x38x1.0~4.0

      380x380x8.0~14.0

      22x35x09~2.0

      250x150x6~12.0

      1000x500x10~28.0

      40x40x1.0~4.5

      400x400x8.0~14.0

      25x40x0.9~3.75

      250x100x6~12.0

      1000x600x10~28.0

      44x44x1.0~4.5

      420x420x10.0~14.0

      25x65x1.0~2.0

      250x200x6~12.0

      1000x800x10~28

      45x45x1.0~5.0

      450x450x10.0~14.0

      30x40x1.0~3.75

      300x150x6~12.0

       

      50x50x1.0~5.0

      480x480x10.0~14.0

      30x45x1.0~3.75

      300x200x6~12.0

       

      60x60x1.5~5.0

      500x500x10.0~14.0

      30x50x1.0~4.0

      300x250x6~12.0

       

      70x70x2.0~6.0

      550x550x10.0~40.0

      30x60x1.0~4.5

      400x250x8~12.0

       

      75x75x2.0~6.0

      600x600x10.0~40.0

      40x50x1.0~4.5

      400x300x8~12.0

       

      80x80x2.0~6.0

      700x700x10.0~40.0

      40x60x1.0~5.0

      450x200x8~12.0

       

      85x85x2.0~6.0

      800x800x10.0~50.0

      40x80x1.5~5.0

      450x250x8~12.0

       

      95x95x2.0~8.0

      900x900x10.0~50.0

      40x100x2.0~5.0

      400x300x8~12.0

       

      100x100x2.0~8.0

      1000x1000x10.0~50

      50x60x2.0~5.0

      400x350x8~12.0

       

      120x120x4.0~8.0

       

      50x80x2.0~5.0

      500x200x10~12.0

       

      150x150x6.0~10.0

       

      50x100x2.0~8.0

      500x250x10~12.0

       

      180x180x6.0~12.0

       

      60x80x2.0~6.0

      500x300x10~12.0

      Application scenarios

      Rectangular steel tubes have become an ideal choice in fields such as construction, machinery, and transportation due to their efficient structural performance, lightweight design, ease of installation, and wide applicability, balancing both economic and functional aspects.

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      Company Profile

      Sky Steel Construction Co., Ltd. is a large-scale modern steel complex integrating sintering, ironmaking, steelmaking, continuous casting, steel rolling, and metal products production processes. The company has more than 300 employees and has advanced 12 high frequency welding production lines. With more than 30 years of experience in steel production, it can provide a variety of solutions to customer satisfaction.
      Our company mainly deals in high-quality and low-cost steel wire,Carbon steel pipe, carbon steel plate, profiles, galvanized products, wire, steel mesh, etc. We can customize various sizes, materials, standards, and painting according to customer needs. . With advanced production technology and strict testing technology, the company passed the ISO9001-2000 international quality system certification in 2007.

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      Packaging and Shipping

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      fAQ

      Q1: What is black square steel tube?
      A: It is a welded steel tube with a square cross-section. The "black" color comes from the manufacturing process (no galvanization), and it offers high strength and rigidity.
      Q2: What materials are used to make it?
      A: Typically made from mild steel grades like Q195, Q235, or equivalent (e.g., ASTM A36, S235JR).
      Q3: What sizes are available?
      A: Common sizes range from 20mm x 20mm to 200mm x 200mm. Wall thickness is usually from 1.5mm to 8.0mm. We can also customize lengths.
      Q4: What are the main applications?
      A: It is widely used in construction (frames, supports), manufacturing (trailers, racks), fencing, and furniture.
      Q5: What is the standard length?
      A: The standard length is usually 6 meters, but we can cut to your required size.

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